package com.lagou.unit;


import sun.misc.Unsafe;

import java.lang.reflect.Field;

/**
* VM Args： -XX:MaxDirectMemorySize=10M
*/
public class DirectMemoryOOM {
    private static final int _1MB = 1024 * 1024;
   	 	public static void main(String[] args) throws Exception {
            Field unsafeField = Unsafe.class.getDeclaredFields()[0];
            unsafeField.setAccessible(true);
            Unsafe unsafe = (Unsafe) unsafeField.get(null);
            while (true) {
            	unsafe.allocateMemory(_1MB);
        	}
    }
}